Silencer for drying appliance and quiet hairdryer
US8601713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2009 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Aug 18, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/663
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a silent hair dryer (3) comprising at least one casing (30) comprising an inlet end (33) and an outlet end (31) and enclosing at least one turbine (T) sucking in air via at least one admission orifice (330) upstream of the turbine (T) and expelling it downstream via at least one outlet orifice (310), and generating determined sound frequencies, characterized in that it comprises a silencer comprising at least one chamber (10) upstream of the admission orifice (330) and comprising an inlet orifice (110) for aspiration of air upstream of the chamber (10), the diameter of the chamber (10) being greater than the diameter of the admission orifice (330) and the diameter of the inlet orifice (110), the length (L) and the diameter (Dc) of the chamber (10) being of such a size so as to define a volume tuned as a function of said determined sound frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.